• 3 Verona Shelving Facility

• 13 National parks and reserves
• 9 Historic sites
• 5 National monuments
• 4 African Americans
• 3 Military parks
• 3 War memorials
• 2 Battlefields
• 2 Civil rights
• 2 Indians of North America
• 2 Monuments
• 1 Allegheny Portage Railroad
• 1 Antiquities
• 1 Bull Run, 1st Battle of, Va., 1861
• 1 Bull Run, 2nd Battle of, Va., 1862
• 1 Campaigns
• 1 Castillo de San Marcos (Saint Augustine, Fla.)
• 1 Central High School (Little Rock, Ark.)
• 1 Central Pacific Railroad Company
• 1 Corinth, Battle of, Corinth, Miss., 1862
• 1 Fort Donelson, Battle of, Tenn., 1862
• 1 Historic districts
• 1 Historic parks
• 1 Homestead law
• 1 Industrialists

• 25 United States. National Park Service
• 5 Harpers Ferry Center (U.S.)

• 25 English

• 13 United States
• 2 Mississippi
• 2 Tennessee
• 2 Virginia
• 1 Alabama
• 1 Allegheny Portage Railroad National Historic Site
• 1 Allegheny Portage Railroad National Historic Site (Pa.)
• 1 Andersonville
• 1 Andersonville National Historic Site
• 1 Andersonville National Historic Site (Ga.)
• 1 Arkansas
• 1 Belmont-Paul Women's Equality National Monument (Washington, D.C.)
• 1 Boston
• 1 Boston African American National Historic Site
• 1 Boston African American National Historic Site (Boston, Mass.)
• 1 Brown v. Board of Education National Historic Site (Topeka, Kan.)
• 1 California
• 1 Castillo de San Marcos National Monument
• 1 Castillo de San Marcos National Monument (Saint Augustine, Fla.)
• 1 Cedar Creek
• 1 Cedar Creek and Belle Grove National Historical Park
• 1 Cedar Creek and Belle Grove National Historical Park (Va.)
• 1 Chicago
• 1 Corinth Unit of Shiloh National Military Park (Miss. and Tenn.)
• 1 Ebey's Landing National Historical Reserve

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